FPViewer is an application to display analog video using Easycap & UVC video grabber device connected via OTG cable to android device.(no root)
Also, FPViewer offers an optimized feature allows you to use the Android devices as FPV monitor.
Display analog video using Easycap video grabber device on android device.(only support UTV007, HTV600, HTV800 version Easycap and not support audio input)
UVC Video Grabber or UVC Webcam Viewer
Display analog video using UVC video grabber device on android device.(this device's function is same with Easycap) Also, If your USB camera is UVC type then, you can use the camera with this app.(only support 640x480 resolution)
Save display video as a MP4 file.(Android 4.3 or higher)
Side by Side(VR)
Support Side by Side(VR) mode, so you can use android device as fpv goggle.
Always On Top
Set the viewer screen to the top of the phone screen. so viewer screen never disappear even if you get a phone call or text notification.